body {
    margin: 0;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-end; /* 将内容对齐到底部 */
    background-color: #808080; /* 初始中性色 */
    transition: background-color 0.3s, filter 0.3s;
    position: relative; /* 为绝对定位的图标提供参考 */
}

.container {
    text-align: center;
    margin-bottom: 20px; /* 增加底部间距 */
}

.slider-container {
    margin: 20px 0;
}

input[type="range"] {
    width: 300px;
}

.fullscreen-icon {
    position: absolute;
    top: 10px;
    right: 10px;
    font-size: 20px; /* 调整字体大小 */
    width: 30px; /* 设置宽度 */
    height: 30px; /* 设置高度 */
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    color: white;
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 5px;
    transition: background-color 0.3s;
}

.fullscreen-icon:hover {
    background-color: rgba(0, 0, 0, 0.7);
} 